| <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" |
| "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> |
| <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> |
| <head> |
| <meta http-equiv="Content-Type" content="text/html; charset=us-ascii" /> |
| |
| <meta http-equiv="Content-Style-Type" content="text/css" /> |
| <meta http-equiv="Content-Script-Type" content="text/javascript" /> |
| <title>Embedded mapping</title> |
| <meta name="generator" content="Oracle DARB XHTML Converter (Mode = ohj/ohw) - Version 5.1.1" /> |
| <meta name="date" content="2010-05-19T8:12:44Z" /> |
| <meta name="robots" content="noarchive" /> |
| <meta name="doctitle" content="Embedded mapping" /> |
| <meta name="relnum" content="Release 2.3" /> |
| <meta name="copyright" content="Copyright (c) 2000, 2008 oracle . All rights reserved. This program and the accompanying materials are made available under the terms of the Eclipse Public License v1.0 which accompanies this distribution, and is available at http://www.eclipse.org/legal/epl-v10.html. Contributors: Oracle - initial API and implementation" /> |
| <link rel="copyright" href="dcommon/html/cpyr.htm" title="Copyright" type="text/html" /> |
| <link rel="stylesheet" href="dcommon/css/blafdoc.css" title="Oracle BLAFDoc" type="text/css" /> |
| <!-- contents --> |
| </head> |
| <body> |
| <p><a id="BABCBHDF" name="BABCBHDF"></a></p> |
| <div class="sect2"><!-- infolevel="all" infotype="General" --> |
| <h1>Embedded mapping</h1> |
| <p><a id="sthref118" name="sthref118"></a><a id="sthref119" name="sthref119"></a><a id="sthref120" name="sthref120"></a><a id="sthref121" name="sthref121"></a>Use an <span class="bold">Embedded Mapping</span> to specify a persistent field or property of an entity whose value is an instance of an embeddable class.</p> |
| <ol> |
| <li> |
| <p>In the <a href="ref_persistence_outline.htm#BABEGGFE">JPA Structure view</a>, right-click the field to map.</p> |
| </li> |
| <li> |
| <p>Select <span class="bold">Map as > Embedded</span>. The <a href="ref_persistence_map_view.htm#BABIFBAF">JPA Details view (for attributes)</a> displays the properties for the selected field.</p> |
| </li> |
| <li> |
| <p>Use this table to complete the remaining fields on the <span class="gui-object-title">JPA Details</span> view.</p> |
| <div class="inftblruleinformal"> |
| <table class="RuleInformal" title="This table lists the fields in the Persistence Properties view for this mapping." summary="This table lists the fields in the Persistence Properties view for this mapping." dir="ltr" border="1" width="100%" frame="border" rules="all" cellpadding="3" cellspacing="0"> |
| <col width="19%" /> |
| <col width="*" /> |
| <col width="38%" /> |
| <thead> |
| <tr align="left" valign="top"> |
| <th align="left" valign="bottom" id="r1c1-t15">Property</th> |
| <th align="left" valign="bottom" id="r1c2-t15">Description</th> |
| <th align="left" valign="bottom" id="r1c3-t15">Default</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr align="left" valign="top"> |
| <td align="left" id="r2c1-t15" headers="r1c1-t15">Entity Mapping Hyperlink</td> |
| <td align="left" headers="r2c1-t15 r1c2-t15">Defines this mapping as a <span class="bold">Embedded</span>. |
| <p>This corresponds to the <code>@Embedded</code> annotation.</p> |
| </td> |
| <td align="left" headers="r2c1-t15 r1c3-t15">Embedded</td> |
| </tr> |
| <tr align="left" valign="top"> |
| <td align="left" id="r3c1-t15" headers="r1c1-t15">Attribute Overrides</td> |
| <td align="left" headers="r3c1-t15 r1c2-t15">Specify to override the default mapping of an entity's attribute. Select <span class="bold">Override Default</span>.</td> |
| <td align="left" headers="r3c1-t15 r1c3-t15"><br /></td> |
| </tr> |
| </tbody> |
| </table> |
| <br /></div> |
| <!-- class="inftblruleinformal" --></li> |
| </ol> |
| <p>Eclipse adds the following annotations to the field:</p> |
| <pre xml:space="preserve" class="oac_no_warn"> |
| @Embedded |
| @AttributeOverride(column=@Column(table="<span class="italic"><COLUMN_TABLE></span>", name = "<span class="italic"><COLUMN_NAME></span>")) |
| </pre> |
| <p> </p> |
| <img src="img/ngrelt.png" alt="Related task" title="Related task" /><br /> |
| <br /> |
| <a href="task_mapping.htm#BABDGBIJ">Mapping an entity</a> |
| <p> </p> |
| <img src="img/ngrelr.png" alt="Related reference" title="Related reference" /><br /> |
| <br /> |
| <a href="ref_persistence_outline.htm#BABEGGFE">JPA Structure view</a><br /> |
| <a href="ref_persistence_map_view.htm#BABIFBAF">JPA Details view (for attributes)</a> |
| <p> </p> |
| <img src="img/ngrelc.png" alt="Related concept" title="Related concept" /><br /> |
| <br /> |
| <a href="concept_mapping.htm#BABBDJFI">Understanding OR mappings</a><br /> |
| <a href="concepts001.htm#BABBGFJG">Understanding EJB 3.0 Java Persistence API</a></div> |
| <!-- class="sect2" --> |
| <!-- Start Footer --> |
| <div class="footer"> |
| <table class="simple oac_no_warn" summary="" cellspacing="0" cellpadding="0" width="100%"> |
| <col width="86%" /> |
| <col width="*" /> |
| <tr> |
| <td align="left"><span class="copyrightlogo">Copyright © 2006, 2010, Oracle and/or its affiliates. All rights reserved.</span><br /> |
| <a href="dcommon/html/cpyr.htm"><span class="copyrightlogo">Legal Notices</span></a></td> |
| </tr> |
| </table> |
| </div> |
| <!-- class="footer" --> |
| </body> |
| </html> |